Open-closed sign

Details Open-closed sign Open-closed sign

1985-02-11

1986-11-18

Swiatek, Robert P.

Card, picture, or sign exhibiting

Changing exhibitor

Sliding plate

40488, G09F 1100

Patent

active

046227709

ABSTRACT:
A compact "OPEN-CLOSED" sign is disclosed, consisting of multiple panels overlying one another and slidable to display "OPEN" or "CLOSED" depending on the relative locations of the panels. The letters "O" and "E" are displayed in either covered or displayed according to the apertures in the top two panels.

REFERENCES:
patent: 2897617 (1959-08-01), Haupt
patent: 3111782 (1963-11-01), Quigley
patent: 3650055 (1972-03-01), Bult, III
patent: 3748767 (1973-07-01), Giesecke
patent: 4177593 (1979-12-01), Lockey
patent: 4217713 (1980-08-01), Greenberger
patent: 4485576 (1984-12-01), Greenberger

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